Ashdown BTA400 All Valve 400w Bass Amplifier Head

About This Product

Combining straightforward rotary tone controls with two pairs of additional EQ sliders for the more sonically sophisticated, Ashdown’s ABM preamp became an instant classic when it hit the bass world over a decade ago.

The BTA 400 (Big Tube Head) partners a third-generation ABM preamp with a 400-Watt, 8 x KT88 valve output stage for ABM sophistication with bone-crushing tube power. All the ABM features are there – EQ In/Out footswitching, variable Tube/Solid-State input stages, on-board compressor and Sub Harmonic Generator, ,balanced DI Output with Pre/Post EQ switching, FX loop, Tuner output and more. The BTA 400 partners perfectly with a range of Ashdown US Series cabinets.

Specification

Power Output (RMS) 400W
Power Requirement 230 / 115V
Frequency Response -3dB at 17Hz and 30kHz
Speaker Outputs Minimum impedance 4 Ohms
High Instrument Input Impedance 3.9m Ohms, input range 150mV -
Low Instrument Input Impedance 10k Ohms, input range 300mV -
Line Input Impedance 22k Ohms, input level 0dBu nominal
Sub Output Impedance 1k Ohms, level 0dBu Nominal
DI Output 600 Ohms balanced, level 0dBu nominal
Tuner Output Impedance 22k Ohms, level 0dBu nominal
EQ Bass +/-15dB @ 45Hz, Middle +/-15dB @ 660Hz, Treble +/-15dB @ 7kHz shelving, Slider 1 +/-15dB @ 180Hz, Slider 2 +/-15dB @ 340Hz, Slider 3 +/-15dB @ 1.3kHz, Slider 4 +/-15dB @ 2.6kHz, Shape (Push Flat) +8dB @ 50Hz & 4kHz, -8dB @ 400Hz, filter slope - 6dB/octave
Effects Send Impedance 22k Ohms, level 0dBu nominal
Effects Return Impedance 22k Ohms, input level 0dBu Nominal
Dimensions H x W x D (mm) 362 x 610 x 300
Weight (kg) 35